What is Fragments in Android SDK?

Fragments in Android SDK are reusable portions of a user interface within an Activity. They allow developers to create flexible and dynamic UI designs by breaking down complex layouts into smaller, manageable components. Fragments can also be combined and reused across different activities, enhancing the modularity of the application. They are particularly useful in creating responsive designs for various screen sizes, such as tablets and smartphones.

A Fragment has its own lifecycle, which is closely tied to the host Activity's lifecycle. This means a Fragment can exist without an Activity, and its UI can change alongside that of its parent Activity. For example, a Fragment can be displayed in one Activity as a full-screen interface and reused in another Activity, perhaps within a smaller view.

Example of Fragment in Android

public class ExampleFragment extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_example, container, false);
    }
}